A super-high angular resolution principle for coded-mask X-ray imaging beyond the diffraction limit of a single pinhole | |
Zhang, Chen ; Zhang, Shuang-Nan | |
2010-10-12 ; 2010-10-12 | |
关键词 | instrumentation: high angular resolution techniques: image processing telescopes TELESCOPES ASTRONOMY MISSION Astronomy & Astrophysics |
中文摘要 | High angular resolution X-ray imaging is always useful in astrophysics and solar physics. In principle, it can be performed by using coded-mask imaging with a very long mask-detector distance. Previously, the diffraction-interference effect was thought to degrade coded-mask imaging performance dramatically at the low energy end with its very long mask-detector distance. The diffraction-interference effect is described with numerical calculations, and the diffraction-interference cross correlation reconstruction method (DICC) is developed in order to overcome the imaging performance degradation. Based on the DICC, a super-high angular resolution principle (SHARP) for coded-mask X-ray imaging is proposed. The feasibility of coded mask imaging beyond the diffraction limit of a single pinhole is demonstrated with simulations. With the specification that the mask element size is 50 x 50 mu m(2) and the mask-detector distance is 50 m, the achieved angular resolution is 0.32 arcsec above about 10 keV and 0.36 arcsec at 1.24 keV (lambda = 1 nm), where diffraction cannot be neglected. The on-axis source location accuracy is better than 0.02 arcsec. Potential applications for solar observations and wide-field X-ray monitors are also briefly discussed. |
语种 | 英语 ; 英语 |
出版者 | SCIENCE PRESS ; BEIJING ; 16 DONGHUANGCHENGGEN NORTH ST, BEIJING 100717, PEOPLES R CHINA |
内容类型 | 期刊论文 |
源URL | [http://hdl.handle.net/123456789/78843] ![]() |
专题 | 清华大学 |
推荐引用方式 GB/T 7714 | Zhang, Chen,Zhang, Shuang-Nan. A super-high angular resolution principle for coded-mask X-ray imaging beyond the diffraction limit of a single pinhole[J],2010, 2010. |
APA | Zhang, Chen,&Zhang, Shuang-Nan.(2010).A super-high angular resolution principle for coded-mask X-ray imaging beyond the diffraction limit of a single pinhole.. |
MLA | Zhang, Chen,et al."A super-high angular resolution principle for coded-mask X-ray imaging beyond the diffraction limit of a single pinhole".(2010). |
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